Pump



E. SANDERS.

PUMP.

APPLICATION FILED MAY 6, 1920.

Patented Mar.

ED, s'rars EDWARD SANDERS, or ONRQEQMIGHIGAN.

, pumps operated by hand for the purpose of inflating small pneumatic tires, such as bicycle and automobile tires, and has for its object to provide a method of attaching the tubes "or barrels to the base andto the yoke or top, which will produce an air tight. and rigid connection, avoiding threading, and providing a much cheaper and stronger attachment than heretofore known, and one which cannot leak under any circumstances. The nventlon also contemplates the use or" an automatlc oiling devlce'for the pump,

of original .construction and cheap design,

which is very effective in keeping the plungers well oiled for almost an indefinite period, and at the same time to utilizeaminimum supply of lubricating fluid. V lVith these. and other objects in view, which will be more particularly referred to hereinafter, I now refer to the attached drawings, in which, V p

Figure 1 represents a vertical section of my improved pump, showing the oiling device attached thereto.

Fig.2 is a longitudinal section on theline. 22, of Fig. 1. Fig. 3 i a longitudinal. section along the line 3-3 of Fig. 1.

Fig. 4; is a verticalseotion showing the base or pedestah'and Fig. 5 a perspective view'of one of the rings used in fitting the barrels into the base and top.

The invention contemplates the'use. ofthe ordinary class of handpump with the ini provement in the construction thereof asindicated herein. 1 denotes the base of the pump having integral therewith, the cups or receptacles 2, and, 8 into which are fitted the barrels or the cups 4 and 5, in the manner to be described hereinafter. The upper ends of thebarrels or tubes 4 and'5 are fitted into the top or yoke 6, as will be more fully The barrel or tube 4 has within it the piston 7, which is secured at itsvtop to the handle 8, having affixed to its bottom the washer-or plunger C rum.

i Specification of Letters Patent. 'Pgfi ented Application filed Maya, 1920. Serial No. 379,205.

FF E E-T 9 Ma. 1,192.1. I

member 9, whichisipreferably composed of leather.

the piston; or plunger 7, is on the down stroke it will force the air down through the his member 9 is narrow at the top and wide. at the. bottom, so that when barrel or tube 4, through the duct or canal I 10,. and up into the barrel or tube 5. .The

arrangement of the parts in the construction a andjoperatioir or the barrel or tube-5 is somewhat similar to thebar rel 'and piston heretofore" described. It; has within it the piston 11-, which is secured at itsupper end,

to the handle 8, and having fixed to its lower end thewa-sher or plunger mechanismj 12, which 'is also preferablycomposed of leather. This washer mechanism'12 isdifferent from'that shown at 9 in, the tube 4, in that it is narrow at the bottom and wide at the top, also having'therein theIone-way valves'13. These valves 1-3 are'closeda'uto matica-lly on the up strokeot the piston and are open-on the down stroke Thus it will be" seen that whenthe pistons 7taud 11 are forced down, the plunger 9 propelsthe air through the duct or canal 10, as heretofore set forth," into "the barrelj or tube 5, and the valves 1.3,b'e1ng open, the air isfurther forced up through? the said valves 1 r that on both the up and down strokes of the pistons, there is a continuous flowu-of airfrom' the pump whi'chfonly stops when the manipulation of the pump is ended.

Approaching now the more pertinent part lower annular walls 16 (infill-7, or the' cups '95 of my invention, itwill be seen th'at the or receptacles 2 and 8,-a're downwardly-diverging. into the cups sand 3, are placed the rings ll-Band 19, a perspective viewof one of which is shown in Fig. 5;" It will be' noticed that these rings also diverge downwardly, and" when placed within the: cups, the sides thereof runpara'llel to the V downwardly" diverging annular walls of the These rings are smaller in diameter cups. than the inside walls of the cups. In fix ng the barrels into the cups, the rings are first placed therein, after'which the barrels are forced in, the cylindrical wall of thesbarrels being placed between the downwardly diverging annular walls of the cups and the downwardly diverging rings; Thus as pressure 13 brought to bear for inserting the barrels firmly into position, the bottoms of the barrels will necessarily expand or flare, and when driven down to the bottom or the cups will form a perfectly air tight fit, without use of the ordinary threaded arrangement found in pumps of a, similar character. V

The top of the barrelt, is fitted into the yoke or top 6, in a similar manner, 20jrepresenting the upwardly diverging cup in ring being similar in shape, construction, use

and operation as those previously described.

The constructionvand operation of the automatic oiler is as follows: 22 is asmall cylinder secured in a conventional manner into the base and the top or yoke 6, and the bottom of which rests upon the shoulders 23, of the base and directly over the duct 24. In'the bottom ofthe cylinder 22,-there is placed a small quantity of lamp wicking, or other absorbent substance indicated at 25,

yoke, barrels or tubes held in position to the i the rest of the cylinder being filled with oil.

Thisvoil gradually soaks through the absorbent substance 25, and very slowly, drop by drop, drips'down into and through the duct at 24, into the duct 10, and, as the air is forced backward and forward, it carries with it a small amount of oil, which finally adheres to the inner'wall of the barrels 4 and 5, thus lubricating the plunger mechanism and insuring a long lasting quantity of oil. 2 Thus it will be perceived that I have invented a pump of air tight construction avoiding the use of'screw threads on the barrels and base, rendering leakage impossible, providing a connection that is stronger and better in every way than those heretofore in;

vented, but which is much less expensive, and with an automatic selfoiler which insures the easy operation and indefinite existence of the mechanism without-the necessity of repeatedly taking the device apart to lubricate the parts.

Having thus fully described my invention, what I claim is: r

1. In a pump, the combination of two i barrels, a base having integral therewith cups or receptacles the lower annular walls of which'are downwardly diverging and into which are fitted the lower ends of the barrels, downwardly diverging rlngs within said cups or receptacles for causing the lower ends 'of'the said barrels to flare when forced in ,to thecups or receptacles and to thereby hold them in fixed and rigid position, a yoke or top having atone end thereof a cup or receptacle with upwardly diverging walls into which is fitted the upper end of one of the said barrels, a ring havlng upwardly diverging walls, which causes the upper end of said barrel to expand or flare as it is forced into position, a, member secured to the other end 'ofthe said top or yoke having therein an air vent," the said member having also a cup or receptacle the upper annular walls of which are upwardly.

diverging'andinto which isfitted the upper end of the other said barrel, and a ring with upwardly diverging wallswhich causes the upper end of the other said barrel to e,\'- 1;

pandor flare when the same is forced into position.- c ,7 V

.2. I An air pump comprising a top or yoke,

abase, two barrels secured n permanent position to the said top and base, and an automatic self oiling device secured at its top to the said yoke and at its bottom to the said base. 3

3. An air pump comprising. a base, a

base and to the yoke, and a hollow cylinder adapted to .hold lubricatingfluid, fixed to the said device whereby lubricating medium is permitted to travel into the said barrels or tubes and thereby lubricate the working parts of the said device. 2

4:. In a pump the combination of a yoke,

a base, barrels or tubes securedin fixed position to the said yokeand base, cups integral with the said base into which the bottoms of the said barrels are fitted, a duct leading from one cup to the other, a lubricating de-' vice fixed into the base, and a second duct in said base, thesecond'said duct communieating at its bottom to thefirst said duct and having an annular shoulder on which the said oiling device rests, so that oil or other lubricating medium is allowedto pass from the said oiling device through the said second duct into the first said duct and thence into the said barrels In testimony whereof, I hereunto afiixmy V signature. 2

. EDWARD SANDERS. 

